US5226058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spread spectrum data processor clock
Assignee: Motorola Solutions Inc
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Filing: 1991-09-30
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Granted: 1993-07-06
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Expires: 2011-09-30
Abstract
Abstract A noise signal is obtained from a data processor output, such as a data line, an address line, or a control line, and used to control the frequency modulation of an oscillator. The modulated output is used to clock the data processor.
Inventors
- 👤 Mark V. Anderson
- 👤 Michael P. Holmans
- 👤 Bruce D. Oberlies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:48
CPC Classifications
G; G06; G06F; G06F1/00; G06F1/04; G06F1/08; G06F11/00; H; H04; H04B; H04B15/00; H04B15/02; H04B15/04; H04B2215/00; H04B2215/064
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
37 words
A spread spectrum data processor clock comprising: means for providing a digital noise output from a data processor; and oscillator means, modulated by said digital noise output, for providing a clock signal for clocking said data processor.
Claim 2
Dependent Claim
37 words
A spread spectrum data processor clock comprising: means for providing a digital noise output from a data processor; and oscillator means, modulated by said digital noise output, for providing a clock signal for clocking said data processor.
Claim 3
Dependent Claim
16 words
The spread spectrum data processor clock of claim 1 wherein said data processor comprises a microcontroller.
Claim 4
Dependent Claim
23 words
The spread spectrum data processor clock of claim 1 wherein said oscillator means comprises an oscillator tank coupled to an oscillation amplifier means.
Claim 5
Dependent Claim
19 words
The spread spectrum data processor clock of claim 3 wherein said oscillator tank comprises a voltage controlled oscillator tank.
Claim 6
Dependent Claim
252 words
The spread spectrum data processor clock of claim 1 wherein said oscillator means comprises: an oscillation amplifier means for said data processor having an input coupled to an oscillator input of said data processor and an output end coupled to an oscillator output of said data processor; a first resistor having a first end coupled to said digital noise output of said data processor and a second end; a transistor having a base coupled to said second end of said first resistor, a collector, and an emitter coupled to said oscillator output of said data processor; an inductor having a first end coupled to said collector of said transistor and a second end coupled to said oscillator output of said data processor; a first capacitor having a first end coupled to said collector of said transistor and a second end coupled to said oscillator output of said data processor; an oscillator crystal having an input coupled to said collector of said transistor and an output coupled to said oscillator input of said data processor; a second resistor having a first end coupled to said oscillator output of said data processor and a second end coupled to said oscillator input of said data processor; a second capacitor having a first end coupled to said oscillator output of said data processor and a second end coupled to a ground; and a third capacitor having a first end coupled to said oscillator input of said data processor and a second end coupled to a ground.
Claim 7
Dependent Claim
32 words
The spread spectrum data processor of claim 1 wherein said digital noise output is provided from one of an address line, a data line and a control line of said data processor.
Claim 8
Dependent Claim
63 words
A spread spectrum data processor clock comprising: means for providing a digital noise output from a data processor; oscillator means for providing an output signal in response to an oscillator output signal of said data processor; and means for frequency modulating said output signal of said oscillator means with said digital noise output to provide a clock signal for clocking said data processor.
Claim 9
Dependent Claim
63 words
A spread spectrum data processor clock comprising: means for providing a digital noise output from a data processor; oscillator means for providing an output signal in response to an oscillator output signal of said data processor; and means for frequency modulating said output signal of said oscillator means with said digital noise output to provide a clock signal for clocking said data processor.
Claim 10
Dependent Claim
16 words
The spread spectrum data processor clock of claim 7 wherein said data processor comprises a microcontroller.
Claim 11
Dependent Claim
33 words
The spread spectrum data processor clock of claim 7 wherein said digital noise output is provided from one of an address line, a data line, and a control line of said data processor.
Claim 12
Dependent Claim
248 words
A spread spectrum data processor clock comprising: a data processor having a digital noise output, an oscillator output coupled to an output of an oscillation amplifier means of said data processor, and an oscillator input coupled to an input of said oscillation amplifier means; a first resistor having a first end coupled to said digital noise output of said data processor and a second end; a transistor having a base coupled to said second end of said first resistor, a collector, and an emitter coupled to said oscillator output of said data processor; an inductor having a first end coupled to said collector of said transistor and a second end coupled to said oscillator output of said data processor; a first capacitor having a first end coupled to said collector of said transistor and a second end coupled to said oscillator output of said data processor; an oscillator crystal having an input coupled to said collector of said transistor and an output coupled to said oscillator output of said data processor; a second resistor having a first end coupled to said oscillator output of said data processor and a second end coupled to said oscillator input of said data processor; a second capacitor having a first end coupled to said oscillator output of said data processor and a second end coupled to a ground; and a third capacitor having a first end coupled to said oscillator input of said data processor and a second coupled to a ground.
Claim 13
Dependent Claim
248 words
A spread spectrum data processor clock comprising: a data processor having a digital noise output, an oscillator output coupled to an output of an oscillation amplifier means of said data processor, and an oscillator input coupled to an input of said oscillation amplifier means; a first resistor having a first end coupled to said digital noise output of said data processor and a second end; a transistor having a base coupled to said second end of said first resistor, a collector, and an emitter coupled to said oscillator output of said data processor; an inductor having a first end coupled to said collector of said transistor and a second end coupled to said oscillator output of said data processor; a first capacitor having a first end coupled to said collector of said transistor and a second end coupled to said oscillator output of said data processor; an oscillator crystal having an input coupled to said collector of said transistor and an output coupled to said oscillator output of said data processor; a second resistor having a first end coupled to said oscillator output of said data processor and a second end coupled to said oscillator input of said data processor; a second capacitor having a first end coupled to said oscillator output of said data processor and a second end coupled to a ground; and a third capacitor having a first end coupled to said oscillator input of said data processor and a second coupled to a ground.
Claim 14
Dependent Claim
16 words
The spread spectrum data processor clock of claim 10 wherein said data processor comprises a microcontroller.
Claim 15
Dependent Claim
33 words
The spread spectrum data processor clock of claim 10 wherein said digital noise output is provided from one of an address line, a data line, and a control line of said data processor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-07-05 | 1997-01-04 | 1997-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-05 | 2001-01-04 | 2001-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-05 | 2005-01-04 | 2005-07-06 | $7700.00 | Window Closed / Lapsed |